2005-04-17 00:20:36 +02:00
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/*
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* linux/fs/sysv/inode.c
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*
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* minix/inode.c
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* xenix/inode.c
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* Copyright (C) 1992 Doug Evans
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*
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* coh/inode.c
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* Copyright (C) 1993 Pascal Haible, Bruno Haible
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*
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* sysv/inode.c
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* Copyright (C) 1993 Paul B. Monday
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*
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* sysv/inode.c
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* Copyright (C) 1993 Bruno Haible
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* Copyright (C) 1997, 1998 Krzysztof G. Baranowski
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*
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* This file contains code for allocating/freeing inodes and for read/writing
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* the superblock.
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*/
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#include <linux/smp_lock.h>
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#include <linux/highuid.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/buffer_head.h>
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#include <linux/vfs.h>
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#include <asm/byteorder.h>
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#include "sysv.h"
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/* This is only called on sync() and umount(), when s_dirt=1. */
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static void sysv_write_super(struct super_block *sb)
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{
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struct sysv_sb_info *sbi = SYSV_SB(sb);
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unsigned long time = get_seconds(), old_time;
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lock_kernel();
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if (sb->s_flags & MS_RDONLY)
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goto clean;
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/*
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* If we are going to write out the super block,
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* then attach current time stamp.
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* But if the filesystem was marked clean, keep it clean.
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*/
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old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
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if (sbi->s_type == FSTYPE_SYSV4) {
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if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38 - old_time))
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*sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38 - time);
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*sbi->s_sb_time = cpu_to_fs32(sbi, time);
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mark_buffer_dirty(sbi->s_bh2);
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}
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clean:
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sb->s_dirt = 0;
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unlock_kernel();
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}
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static int sysv_remount(struct super_block *sb, int *flags, char *data)
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{
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struct sysv_sb_info *sbi = SYSV_SB(sb);
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if (sbi->s_forced_ro)
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*flags |= MS_RDONLY;
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if (!(*flags & MS_RDONLY))
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sb->s_dirt = 1;
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return 0;
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}
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static void sysv_put_super(struct super_block *sb)
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{
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struct sysv_sb_info *sbi = SYSV_SB(sb);
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if (!(sb->s_flags & MS_RDONLY)) {
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/* XXX ext2 also updates the state here */
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mark_buffer_dirty(sbi->s_bh1);
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if (sbi->s_bh1 != sbi->s_bh2)
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mark_buffer_dirty(sbi->s_bh2);
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}
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brelse(sbi->s_bh1);
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if (sbi->s_bh1 != sbi->s_bh2)
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brelse(sbi->s_bh2);
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kfree(sbi);
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}
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2006-06-23 11:02:58 +02:00
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static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf)
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2005-04-17 00:20:36 +02:00
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{
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2006-06-23 11:02:58 +02:00
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struct super_block *sb = dentry->d_sb;
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2005-04-17 00:20:36 +02:00
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struct sysv_sb_info *sbi = SYSV_SB(sb);
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buf->f_type = sb->s_magic;
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buf->f_bsize = sb->s_blocksize;
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buf->f_blocks = sbi->s_ndatazones;
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buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb);
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buf->f_files = sbi->s_ninodes;
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buf->f_ffree = sysv_count_free_inodes(sb);
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buf->f_namelen = SYSV_NAMELEN;
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return 0;
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}
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/*
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* NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32
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*/
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static inline void read3byte(struct sysv_sb_info *sbi,
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unsigned char * from, unsigned char * to)
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{
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if (sbi->s_bytesex == BYTESEX_PDP) {
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to[0] = from[0];
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to[1] = 0;
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to[2] = from[1];
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to[3] = from[2];
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} else if (sbi->s_bytesex == BYTESEX_LE) {
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to[0] = from[0];
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to[1] = from[1];
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to[2] = from[2];
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to[3] = 0;
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} else {
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to[0] = 0;
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to[1] = from[0];
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to[2] = from[1];
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to[3] = from[2];
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}
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}
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static inline void write3byte(struct sysv_sb_info *sbi,
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unsigned char * from, unsigned char * to)
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{
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if (sbi->s_bytesex == BYTESEX_PDP) {
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to[0] = from[0];
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to[1] = from[2];
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to[2] = from[3];
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} else if (sbi->s_bytesex == BYTESEX_LE) {
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to[0] = from[0];
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to[1] = from[1];
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to[2] = from[2];
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} else {
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to[0] = from[1];
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to[1] = from[2];
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to[2] = from[3];
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}
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}
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2007-02-12 09:55:40 +01:00
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static const struct inode_operations sysv_symlink_inode_operations = {
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2005-04-17 00:20:36 +02:00
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.readlink = generic_readlink,
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.follow_link = page_follow_link_light,
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.put_link = page_put_link,
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.getattr = sysv_getattr,
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};
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void sysv_set_inode(struct inode *inode, dev_t rdev)
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{
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if (S_ISREG(inode->i_mode)) {
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inode->i_op = &sysv_file_inode_operations;
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inode->i_fop = &sysv_file_operations;
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inode->i_mapping->a_ops = &sysv_aops;
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} else if (S_ISDIR(inode->i_mode)) {
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inode->i_op = &sysv_dir_inode_operations;
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inode->i_fop = &sysv_dir_operations;
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inode->i_mapping->a_ops = &sysv_aops;
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} else if (S_ISLNK(inode->i_mode)) {
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if (inode->i_blocks) {
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inode->i_op = &sysv_symlink_inode_operations;
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inode->i_mapping->a_ops = &sysv_aops;
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} else
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inode->i_op = &sysv_fast_symlink_inode_operations;
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} else
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init_special_inode(inode, inode->i_mode, rdev);
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}
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static void sysv_read_inode(struct inode *inode)
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{
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struct super_block * sb = inode->i_sb;
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struct sysv_sb_info * sbi = SYSV_SB(sb);
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struct buffer_head * bh;
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struct sysv_inode * raw_inode;
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struct sysv_inode_info * si;
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unsigned int block, ino = inode->i_ino;
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if (!ino || ino > sbi->s_ninodes) {
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printk("Bad inode number on dev %s: %d is out of range\n",
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inode->i_sb->s_id, ino);
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goto bad_inode;
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}
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raw_inode = sysv_raw_inode(sb, ino, &bh);
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if (!raw_inode) {
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printk("Major problem: unable to read inode from dev %s\n",
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inode->i_sb->s_id);
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goto bad_inode;
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}
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/* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */
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inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode);
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inode->i_uid = (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid);
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inode->i_gid = (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid);
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inode->i_nlink = fs16_to_cpu(sbi, raw_inode->i_nlink);
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inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size);
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inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime);
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inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime);
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inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime);
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inode->i_ctime.tv_nsec = 0;
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inode->i_atime.tv_nsec = 0;
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inode->i_mtime.tv_nsec = 0;
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2006-09-27 10:50:49 +02:00
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inode->i_blocks = 0;
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2005-04-17 00:20:36 +02:00
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si = SYSV_I(inode);
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for (block = 0; block < 10+1+1+1; block++)
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read3byte(sbi, &raw_inode->i_data[3*block],
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(u8 *)&si->i_data[block]);
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brelse(bh);
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si->i_dir_start_lookup = 0;
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if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
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sysv_set_inode(inode,
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old_decode_dev(fs32_to_cpu(sbi, si->i_data[0])));
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else
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sysv_set_inode(inode, 0);
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return;
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bad_inode:
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make_bad_inode(inode);
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return;
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}
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static struct buffer_head * sysv_update_inode(struct inode * inode)
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{
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struct super_block * sb = inode->i_sb;
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struct sysv_sb_info * sbi = SYSV_SB(sb);
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struct buffer_head * bh;
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struct sysv_inode * raw_inode;
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struct sysv_inode_info * si;
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unsigned int ino, block;
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ino = inode->i_ino;
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if (!ino || ino > sbi->s_ninodes) {
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printk("Bad inode number on dev %s: %d is out of range\n",
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inode->i_sb->s_id, ino);
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return NULL;
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}
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raw_inode = sysv_raw_inode(sb, ino, &bh);
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if (!raw_inode) {
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printk("unable to read i-node block\n");
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return NULL;
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}
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raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
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raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(inode->i_uid));
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raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(inode->i_gid));
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raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink);
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raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size);
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raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec);
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raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec);
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raw_inode->i_ctime = cpu_to_fs32(sbi, inode->i_ctime.tv_sec);
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si = SYSV_I(inode);
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if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
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si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev));
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for (block = 0; block < 10+1+1+1; block++)
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write3byte(sbi, (u8 *)&si->i_data[block],
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&raw_inode->i_data[3*block]);
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mark_buffer_dirty(bh);
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return bh;
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}
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int sysv_write_inode(struct inode * inode, int wait)
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{
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struct buffer_head *bh;
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lock_kernel();
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bh = sysv_update_inode(inode);
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brelse(bh);
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unlock_kernel();
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return 0;
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}
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int sysv_sync_inode(struct inode * inode)
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{
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int err = 0;
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struct buffer_head *bh;
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bh = sysv_update_inode(inode);
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if (bh && buffer_dirty(bh)) {
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sync_dirty_buffer(bh);
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if (buffer_req(bh) && !buffer_uptodate(bh)) {
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printk ("IO error syncing sysv inode [%s:%08lx]\n",
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inode->i_sb->s_id, inode->i_ino);
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err = -1;
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}
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}
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else if (!bh)
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err = -1;
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brelse (bh);
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return err;
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}
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static void sysv_delete_inode(struct inode *inode)
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{
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2005-09-09 22:01:31 +02:00
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truncate_inode_pages(&inode->i_data, 0);
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2005-04-17 00:20:36 +02:00
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inode->i_size = 0;
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sysv_truncate(inode);
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lock_kernel();
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sysv_free_inode(inode);
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unlock_kernel();
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}
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2006-12-07 05:33:20 +01:00
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static struct kmem_cache *sysv_inode_cachep;
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2005-04-17 00:20:36 +02:00
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static struct inode *sysv_alloc_inode(struct super_block *sb)
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{
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struct sysv_inode_info *si;
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2006-12-07 05:33:17 +01:00
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si = kmem_cache_alloc(sysv_inode_cachep, GFP_KERNEL);
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2005-04-17 00:20:36 +02:00
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if (!si)
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return NULL;
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return &si->vfs_inode;
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}
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static void sysv_destroy_inode(struct inode *inode)
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{
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kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
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}
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2006-12-07 05:33:20 +01:00
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static void init_once(void *p, struct kmem_cache *cachep, unsigned long flags)
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2005-04-17 00:20:36 +02:00
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{
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struct sysv_inode_info *si = (struct sysv_inode_info *)p;
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if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
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SLAB_CTOR_CONSTRUCTOR)
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inode_init_once(&si->vfs_inode);
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}
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struct super_operations sysv_sops = {
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.alloc_inode = sysv_alloc_inode,
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.destroy_inode = sysv_destroy_inode,
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.read_inode = sysv_read_inode,
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.write_inode = sysv_write_inode,
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|
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.delete_inode = sysv_delete_inode,
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|
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.put_super = sysv_put_super,
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.write_super = sysv_write_super,
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.remount_fs = sysv_remount,
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|
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.statfs = sysv_statfs,
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|
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};
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int __init sysv_init_icache(void)
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|
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|
{
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|
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sysv_inode_cachep = kmem_cache_create("sysv_inode_cache",
|
|
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sizeof(struct sysv_inode_info), 0,
|
[PATCH] cpuset memory spread: slab cache filesystems
Mark file system inode and similar slab caches subject to SLAB_MEM_SPREAD
memory spreading.
If a slab cache is marked SLAB_MEM_SPREAD, then anytime that a task that's
in a cpuset with the 'memory_spread_slab' option enabled goes to allocate
from such a slab cache, the allocations are spread evenly over all the
memory nodes (task->mems_allowed) allowed to that task, instead of favoring
allocation on the node local to the current cpu.
The following inode and similar caches are marked SLAB_MEM_SPREAD:
file cache
==== =====
fs/adfs/super.c adfs_inode_cache
fs/affs/super.c affs_inode_cache
fs/befs/linuxvfs.c befs_inode_cache
fs/bfs/inode.c bfs_inode_cache
fs/block_dev.c bdev_cache
fs/cifs/cifsfs.c cifs_inode_cache
fs/coda/inode.c coda_inode_cache
fs/dquot.c dquot
fs/efs/super.c efs_inode_cache
fs/ext2/super.c ext2_inode_cache
fs/ext2/xattr.c (fs/mbcache.c) ext2_xattr
fs/ext3/super.c ext3_inode_cache
fs/ext3/xattr.c (fs/mbcache.c) ext3_xattr
fs/fat/cache.c fat_cache
fs/fat/inode.c fat_inode_cache
fs/freevxfs/vxfs_super.c vxfs_inode
fs/hpfs/super.c hpfs_inode_cache
fs/isofs/inode.c isofs_inode_cache
fs/jffs/inode-v23.c jffs_fm
fs/jffs2/super.c jffs2_i
fs/jfs/super.c jfs_ip
fs/minix/inode.c minix_inode_cache
fs/ncpfs/inode.c ncp_inode_cache
fs/nfs/direct.c nfs_direct_cache
fs/nfs/inode.c nfs_inode_cache
fs/ntfs/super.c ntfs_big_inode_cache_name
fs/ntfs/super.c ntfs_inode_cache
fs/ocfs2/dlm/dlmfs.c dlmfs_inode_cache
fs/ocfs2/super.c ocfs2_inode_cache
fs/proc/inode.c proc_inode_cache
fs/qnx4/inode.c qnx4_inode_cache
fs/reiserfs/super.c reiser_inode_cache
fs/romfs/inode.c romfs_inode_cache
fs/smbfs/inode.c smb_inode_cache
fs/sysv/inode.c sysv_inode_cache
fs/udf/super.c udf_inode_cache
fs/ufs/super.c ufs_inode_cache
net/socket.c sock_inode_cache
net/sunrpc/rpc_pipe.c rpc_inode_cache
The choice of which slab caches to so mark was quite simple. I marked
those already marked SLAB_RECLAIM_ACCOUNT, except for fs/xfs, dentry_cache,
inode_cache, and buffer_head, which were marked in a previous patch. Even
though SLAB_RECLAIM_ACCOUNT is for a different purpose, it marks the same
potentially large file system i/o related slab caches as we need for memory
spreading.
Given that the rule now becomes "wherever you would have used a
SLAB_RECLAIM_ACCOUNT slab cache flag before (usually the inode cache), use
the SLAB_MEM_SPREAD flag too", this should be easy enough to maintain.
Future file system writers will just copy one of the existing file system
slab cache setups and tend to get it right without thinking.
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-24 12:16:05 +01:00
|
|
|
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
|
2005-04-17 00:20:36 +02:00
|
|
|
init_once, NULL);
|
|
|
|
if (!sysv_inode_cachep)
|
|
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void sysv_destroy_icache(void)
|
|
|
|
{
|
|
|
|
kmem_cache_destroy(sysv_inode_cachep);
|
|
|
|
}
|